CN1424886A - Liquid heating module, system comprising said module and process for heating liquid - Google Patents

Liquid heating module, system comprising said module and process for heating liquid Download PDF

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Publication number
CN1424886A
CN1424886A CN00818637A CN00818637A CN1424886A CN 1424886 A CN1424886 A CN 1424886A CN 00818637 A CN00818637 A CN 00818637A CN 00818637 A CN00818637 A CN 00818637A CN 1424886 A CN1424886 A CN 1424886A
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CN
China
Prior art keywords
resistor
pipe
liquid heating
heating component
liquid
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Granted
Application number
CN00818637A
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Chinese (zh)
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CN1243503C (en
Inventor
A·约尔金
胡如国
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Societe des Produits Nestle SA
Nestle SA
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Societe des Produits Nestle SA
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Publication of CN1424886A publication Critical patent/CN1424886A/en
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Publication of CN1243503C publication Critical patent/CN1243503C/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/142—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using electric energy supply
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • A47J31/54—Water boiling vessels in beverage making machines
    • A47J31/542—Continuous-flow heaters
    • A47J31/545—Control or safety devices

Abstract

The present invention concerns a liquid heating module for use in a hot beverage machine, which comprises a hollow tube (2) of metallic material, a cylindrical insert (3), which is disposed inside the hollow tube, along its entire length and substantially along its axis of symmetry, at least one electrical resistor (4) on a first part of the outside of the tube for preheating liquid flowing through said hollow tube and at least one other electrical resistor (5) on a second part of the outside of the tube for temperature adjustment of the liquid flowing through the tube.

Description

The liquid heating component, comprise the system of described assembly and the method for heating liquid
The liquid heating component that the present invention relates in hot beverage maker, use.The invention still further relates to the system that comprises described assembly and the method for heating liquid.
In the coffee machine field, known have a kind of heat that is located in this machine (thermoblock) heater of determining, wherein said heater be the normal open electricity and allow to obtain hot water when preparing coffee when the consumer determines to operate this device.Use this solution that following problem is arranged: the first, temperature is inconsistent, promptly can not obtain in particular range as the constant water temperature between 85-90 ℃; The second, the piece heater of use is very heavy, inconvenience in the time will moving coffee machine; The 3rd, because this machine off-energy when energising, so energy efficiency is very low.
The objective of the invention is at utmost address the above problem.The present invention provides heating system for the consumer.The present invention provides the heating system with accurate temperature scope to the consumer, is not normal open motor but very light heater.
The liquid heating component that the present invention relates to use in hot beverage maker comprises
The hollow pipe that metal material is made,
Be contained at least one resistor in the outside first of described pipe, be used to preheat the liquid that flows through described hollow pipe, and
Be contained in the resistor of another one at least on the outside second portion of described pipe, be used to regulate the fluid temperature that flows through described pipe.
Will be in assembly of the present invention heated liquid unrestricted, can be the liquid of any kind.Institute's heated liquid preferably is used for the water of tea blend, coffee or other types of beverages.It can also be the warm milk that is used to prepare cocoa.Also to consider and be water in the direct Heating Cup or the steam that produces for milk is spumed.Can consider in minicomputer as using heating component in coffee machine or relatively large machine such as the vending machine.
With regard to the resistor that is loaded on pipe first in the coffee machine, use one or more resistors, can be 1 to 5 resistor.With regard to the resistor that is used to manage second portion, use the resistor identical with first number of resistors.In addition, only use a resistor better.
The material of hollow pipe is a metal.Manage and preferably make by stainless steel.The size of pipe can change according to type of service.For example, if be used for coffee machine, then its diameter is approximately 6 to 20mm, length is approximately 100 to 200mm.The thickness of pipe is 1 to 4mm.If be used for vending machine, then the diameter of pipe is approximately 30 to 50mm, length is approximately 200 to 400mm, and the thickness of pipe is identical with the thickness of aforementioned tube.
Hollow pipe length to the scope of described pipe diameter ratio between about 5 to about 40.
Heating component of the present invention also comprises cylindrical insert, and it is arranged on hollow pipe inside, along described hollow pipe total length and substantially along its symmetry axis placement.Owing to be provided with insert, in fact the heater block by energising has promoted by the heat transmission of tube-surface to liquid.Realize excellent energy transmission and water heating rapidly like this.Insert is made by plastics or metal material, and this material meets food grade and has good thermal conductivity.This insert is preferably made by copper or teflon (tetrafluoroethene).The scope of hollow pipe diameter and insert diameter ratio is between 2 to 5.Fixing insert or can be along the insert of its symmetry axis rotation can be set.If the rotation insert, then described insert combines with the current meter swiveling wheel that is arranged on the insert bottom, makes it be able to be driven by flowing cold water thus, and this cold water flows to the current meter screw along tangent angle.Rotatable cylindrical insert comprises metal plug.These metallic brush bundles in (only on the side at insert or on the two symmetrical sides) vertical plane or in a spiral manner for example 1 or 2 spirals run through insert and be combined into one.They only are arranged in the hollow pipe internal insert part.This brush should have suitable mechanical tension and intensity, makes it can remove dirt on the pipe internal surface.Brush bundle end should be at 90 ℃ of slight contact tube inner surfaces.All bundles should be designed to upwards to promote water when rotating by the current meter screw when energising.
Insert can also be a hollow object, and it can introduce the hot water part of reverse flow to promote that with cold water mix and when water is heated water mixes.
The resistor of pipe is to be made by form selected in the group that comprises wire, thick film.This thick film technology is known at electronic applications, is used for the manufacturing of resistor now.This technology is used electrically conductive ink (as glue) on quartz, metal, aluminium or beryllium oxide substrate.As mentioned above, be preferably metal substrate.
Hollow pipe comprises that also another is used for temperature controlled resistor at least.This resistor is arranged on from the inlet of the cold/hot water of pipe or exit.
The power density of resistor reaches 30 to 70W/cm 2The power density of resistor makes water temperature be risen to rapidly about 85-90 ℃ by room temperature.In order to make hollow pipe have the good insulation layer, the described pipe outside that is preferably in below the resistor is coated with enameling.The thickness range of this coating is usually at 100 to 300 microns.At last, cover the resistor of hollow pipe with non-conducting material such as plastics.This insulating barrier can be pipe or one deck non-conducting material.
Liquid heating component of the present invention is as the part of heating synthetic beverage liquid machine.The invention still further relates to the system of heating liquid, comprise
The water source,
Carry the pump of described water to the liquid heating component,
Aforesaid liquid heating component, wherein said 3 parts all are in the liquid connection,
Discharge the passage of heating liquid, be arranged on the material that will extract or in the blender, so that with described heating liquid and powder.
In system of the present invention, pipe is level or vertical the placement.This pipe is preferably vertically placed.
The liquid heating component is based on material such as coffee or the coffee machine of tea extraction or the part of other similar machine.In this case, directly extracting substance as one deck coffee, is espresso (espresso) machine then, and perhaps this material of extraction in box of getting ready or capsule resembles those boxes among EP512468 and the EP602203.
According to second embodiment, system of the present invention is used for vending machine, and promptly the consumer directly obtains the device of cuppa, coffee or cocoa, wherein just before heating liquid flow in the cup, with itself and corresponding powder.
System of the present invention also is arranged on useful parts in coffee machine or the vending machine such as valve, temperature controlling part usually with other, current meter is combined into one.
The present invention also relates to the method for heating liquid at last, wherein carry described liquid with scope at 150 to 1000ml/min flow velocity by aforesaid liquid heating component, and make temperature in 3 to 10 seconds, reach about 85 to 90 ℃, wherein make the resistor normal open electricity in the pipe first, and make the resistor on the pipe second portion connect power supply and deenergization according to the certain frequency that depends on required final temperature.
Can the method according to this invention in several seconds, water be heated to 85-90 ℃ from room temperature, and not need to make the machine normal open.The heating of resistor is only carried out when the consumer wants coffee.First resistor is brought up to water temperature about 60 ℃ from 20 degree, and second group of resistor only needs to bring up to 85 ℃ from 60 ℃.Therefore, do not need often to heat with this second resistor.In this case, the resistor on the pipe second portion is connected power supply in fully energized 50 to 100% time.
Under the situation of electric wire voltage change and change in flow, second resistor is switched on or switched off power supply in the time of a few percent, so that output temperature is suitable.The wattage of this group resistor has such value, and promptly this value makes on/off regulate and can not produce flickering.
Under the situation of first embodiment of system of the present invention, the flow rates that add hot water is between 150 to 300ml/min.If vending machine, then the flow rates of water is between 300 to 1000ml/min.
As mentioned above, to adding hot water temperature control be very useful.In this case, the fluid temperature in measuring tube exit, if temperature is too high, then the resistor on the off-tube second portion if fluid temperature is not high enough, then continues resistor and power connection.
Describe the present invention in detail referring now to accompanying drawing, wherein
Fig. 1 is the schematic diagram of liquid heating component of the present invention;
Fig. 2 is the schematic diagram that the coffee machine of assembly shown in Figure 1 is housed; And
Fig. 3 is the schematic diagram that the vending machine of assembly shown in Fig. 1 is housed.
The cylindrical insert (3) that heating component (1) comprises the hollow pipe (2) made with stainless steel, make with plastics (teflon), be arranged on first resistor (4) in the pipe first and be arranged on second resistor (5) of managing on the second portion.Two resistors are all made by thick film (thick-film) and are connected power supply (11,12).The direction that water flows in hollow pipe is by shown in arrow A and the B.The vertical hollow pipe of installing is so that air that gathers in the pipe or quantity of steam reach minimum.The insert two ends are fixed on cold water lid (6) and the hot water lid (7).Insert (3) connects the swiveling wheel of current meter (8), makes can drive this this rotation opinion and it is rotated along arrow C by flowing cold water.In addition, resistor (9) is arranged on the end of hollow pipe, is used to measure and control the hot water temperature of flowing out assembly.Metallic brush bundle (10) is provided with on the hollow pipe internal insert.Nonconducting insulating barrier (13) is coated on the pipe below the resistor as enamel.For avoiding too high energy loss and guarantee better security, the resistor on the whole height of insulating barrier (14) covering hollow pipe.In hot water lid (7), free space (15) is set, is used for slow preparation and collects the steam and the air that separates that produces.
The liquid heating component is worked in the following manner: when the consumer determined synthetic beverage, two resistors (4,5) were all switched on.Resistor during water flows through hollow pipe (4) keeps the normal open electricity, and resistor (5) is then according to connecting based on the certain frequency of requirement dump energy and cutting off the electricity supply, so that reach the necessary final water temperature of coffee preparation.For example, resistor (4) makes temperature bring up to 65 ℃ by 20 ℃, and resistor (5) only provides water temperature from 65 ℃ of energy of bringing up to 85 ℃.The mobile of water makes current meter (8) rotation and drives insert (3).Metallic brush on the insert (10) is avoided the deposition of the inner any calcium of hollow pipe.
Fig. 2 shows the embodiment of assembly (1) use in coffee machine.This machine comprises cold water vessels (16), and this container connects the pump (18) that cold water is transported to heating component (1) by pipe (17).Exit in assembly (1), flow of hot water are crossed conduit (19) and are arrived the box spare (20) that is placed with the roasting stir-fry and (the roast and ground) coffee of milling.According to the EP512468 patent, this box spare is the seal box spare of opening under pressure.The coffee that preparation is drunk flows in the cup (21).Coffee machine can be equipped with other parts, as valve, automatically controlled product.
Fig. 3 show assembly (1) be used in the vending machine embodiment.Cold water in the container (22) flows through pipe (24) by the pump (23) in the heating component (1).In the exit of described assembly, water temperature reaches about 85 ℃, and flows to blender (26) by conduit (25).Simultaneously, by conveyor screw or advance feeder (28) to make powder such as coffee flow into blender with the hot water of arrival by powder storage tank (27), described powder mixes with hot water and flow in glass (29).As mentioned above, this machine can also be equipped with other and be contained in parts in this machine usually.
The special embodiment relevant with the heating component that is used for coffee machine is described now.
Embodiment
Use diameter to be 12mm, length stainless steel hollow pipe as 160mm.Insert is made of plastics, and its diameter is 4mm, and its length is identical with hollow pipe.The power supply of resistor (4) and (5) is 600W.The maximum pressure that pipe must bear is 20bar.The flow velocity of water is 200ml/min.Reach temperature required in 7 seconds.In this time of 60%, connect second resistor.Owing to have this heater, so temperature keeps very constant in time, and its variation only is about 2 ℃.

Claims (18)

1. a liquid heating component that uses in hot beverage maker comprises
The hollow pipe that metal material is made,
Be contained at least one resistor in the first of described pipe outside, be used to preheat the liquid that flows through described hollow pipe, and
Be contained in another resistor at least on the second portion of described pipe outside, be used to regulate the fluid temperature that flows through described pipe.
2. liquid heating component according to claim 1 also comprises cylindrical insert, and it is arranged on hollow pipe inside, along described hollow pipe total length and substantially along its symmetry axis placement.
3. liquid heating component according to claim 1 and 2, wherein said cylindrical insert is made by plastics or metal material.
4. according to claim 1 or 3 described liquid heating components, wherein hollow pipe is made by stainless steel.
5. according to the arbitrary described liquid heating component of claim 1 to 4, the ratio of the length over diameter of wherein said pipe is between about 5 to about 40.
6. according to the arbitrary described liquid heating component of claim 1 to 5, wherein the outside of hollow pipe comprises that at least one is used for the resistor of temperature survey and control.
7. according to the arbitrary described liquid heating component of claim 1 to 6, wherein insert is fixed or can be rotated around its symmetry axis along its symmetry axis.
8. liquid heating component according to claim 7, wherein insert is owing to combine with the current meter swiveling wheel that is arranged on described insert bottom thereby rotatable.
9. according to the arbitrary described liquid heating component of claim 1 to 8, the different resistors of wherein said pipe are to be made by form selected in the group that comprises wire, thick film.
10. according to Claim 8 or 9 described liquid heating components, wherein rotatable cylindrical insert comprises metal plug.
11. according to the arbitrary described liquid heating component of claim 1 to 10, wherein the power density of all resistors reaches 30-70w/cm 2
12. according to the arbitrary described liquid heating component of claim 1 to 11, wherein hollow pipe comprises and is coated in enamel its outside, under the resistor.
13. according to the arbitrary described liquid heating component of claim 1 to 12, wherein resistor is coated with non-conducting material or adopts the non-conducting material insulation.
14. a system that is used for the liquid heating comprises
The water source,
Carry the pump of described water,
According to the arbitrary described liquid heating component of claim 1 to 13, wherein said 3 parts are all with fluid connection,
Discharge the passage of heating liquid, be arranged on the material that will extract or in the blender, so that with described heating liquid and powder.
15. method that is used for heating liquid, wherein with scope at 150 to 1000ml/min flow velocity by carrying described liquid according to the arbitrary described liquid heating component of claim 1 to 13, and make temperature in 3 to 10 seconds, reach about 85 to 90 ℃, wherein make resistor normal open electricity in the pipe first, and make the resistor on the described pipe second portion connect power supply and deenergization according to the certain frequency that relies on required final temperature.
16. method according to claim 15, the resistor on the wherein said pipe second portion is connected power supply at about 50 to 100% full electric power in the time.
17. according to claim 15 or 16 described methods, wherein the flow rates of coffee machine 150 and 300ml/min between, the flow rates of vending machine is between 300 to 1000ml/min.
18., wherein measure the fluid temperature in described pipe exit according to the arbitrary described method of claim 15 to 17, disconnect the resistor on the described pipe second portion if temperature is too high, continue to make the resistor energising if fluid temperature is not high enough.
CNB008186375A 2000-01-24 2000-12-11 Liquid heating module, system comprising said module and process for heating liquid Expired - Fee Related CN1243503C (en)

Applications Claiming Priority (2)

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EP00101336 2000-01-24
EP00101336.6 2000-01-24

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CN1243503C CN1243503C (en) 2006-03-01

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